期刊
MRS ADVANCES
卷 5, 期 27-28, 页码 1491-1496出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1557/adv.2020.5
关键词
-
资金
- NSF [DMR-1808383]
- ACS PRF [58196-ND10]
- S3IP, State University of New York at Binghamton
- Center for Alkaline-Based Energy Solutions, an Energy Frontier Research Center program - U.S. Department of Energy [DE-SC0019445]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0001135]
We report a facile method to fabricate CuNi nano-octahedra and nanocubes using a colloidal synthesis approach. The CuNi nanocrystals terminated with exclusive crystallographic facets were controlled and achieved by a group of synergetic capping ligands in a hot solution system. Specifically, the growth of {111}-bounded CuNi nano-octahedra is derived by a thermodynamic control, whereas the generation of {100}-terminated CuNi nanocubes is steered by a kinetic capping of chloride. Using a reduction of 4-nitrophenol with sodium borohydride as a model reaction, CuNi nano-octahedra and nanocubes demonstrated a strong facet-dependence due to their different surface energies although both exhibited remarkable catalytic activity with the high rate constant over mass (k/m). A kinetic study indicated that this is a pseudo first-order reaction with an excess of sodium borohydride. CuNi nanocubes as the catalysts showed better catalytic performance (k/m = 385 s(-1)center dot g(-1)) than the CuNi nano-octahedra (k/m = 120 s(-1)center dot g(-1)), indicating that 4-nitrophenol and hydrogen were adsorbed on the {100} facets with their molecules parallel to the surface much easier than those on {111} facets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据